Avalon's FormatConvertedBitmap is a convenient way of getting a greyscale version of an image, but it appears to have some trouble with setting the source property via data binding. The following code fails complaining that the Source property has not been set on the FormatConvertedBitmap:

I've found an issue with the Avalon databinding. I have a library which updates itself in response to a FileSystemWatcher. The problem is that when I bind to this library it throws an exception when this update occurs because it the change doesn't happen on the Avalon dispatcher thread. I'm not sure how to get around this. I'm not directly involved in updating the UI since it's being done via databinding and the library has no knowledge of the UI so it can't redirect the update onto the dispatcher thread. Not sure where to go with this. My initial thoughts is that the databinding code should know how to move onto the dispatcher thread transparently.

System.NotSupportedException was unhandled Message="This type of CollectionView does not support changes to its SourceCollection from a thread different from the Dispatcher thread." Source="PresentationFramework" StackTrace: at System.Windows.Data.CollectionView.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args) at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedAction action, Object item, Int32 index) at System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item) at System.Collections.ObjectModel.Collection`1.Add(T item)

My first forays into the world of Avalon (Windows Presentation Foundation) are going well. Avalon databinding is very nice. Speeds up UI devlopment heaps, which gives you plenty of time to waste trying to work out how to do things since there's little documentation to help.

Anyway, here's a screenshot to show you some stuff. Sorry... I haven't been wasting time putting in lots of pretty animations and gradients. The hardest thing so far was getting the treeview in there. ObservableCollection is great, but ObservableDictionary would be great too...

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